[Plantagenet]

Cell phone reception at 21 km altitude over Switzerland (thats more than 63,000 feet for you math-challenged conspiracy types.....and 63,000+ feet is more than twice as high as the 30,000 feet called "impossible" by the conspiracy pushers)

http://www.swissinfo.org/eng/feature/de ... 2528169000

[Plantagenet]

$this->bbcode_second_pass_quote('TWilliam', '
')$this->bbcode_second_pass_quote('Plantagenet', '')$this->bbcode_second_pass_quote('TWilliam', 't')he plane was traveling so fast that it "vaporized" on impact

[Plantagenet]

http://upload.wikimedia.org/wikipedia/c ... ntagon.jpg


Debris field from impact of Flight 77 scattered near Pentagon after the 9/11 attack proves that claims that the plane vaporized on impact are absurd.

[Carlhole]

$this->bbcode_second_pass_quote('Plantagenet', 'C')ell phone reception at 21 km altitude over Switzerland (thats more than 63,000 feet for you math-challenged conspiracy types.....and 63,000+ feet is more than twice as high as the 30,000 feet called "impossible" by the conspiracy pushers)

http://www.swissinfo.org/eng/feature/de ... 2528169000

[TWilliam]

$this->bbcode_second_pass_quote('Plantagenet', 'C')ell phone reception at 21 km altitude over Switzerland (thats more than 63,000 feet for you math-challenged conspiracy types.....and 63,000+ feet is more than twice as high as the 30,000 feet called "impossible" by the conspiracy pushers)

http://www.swissinfo.org/eng/feature/de ... 2528169000

[Carlhole]

Ok, you're cracking up, fool! Remove the oversize photo. It's messing up the page frame. It has nothing to do with high alttude mobile phone technologies. We've all seen it anyway.


[align=center][/align]

[align=center]What a maroon![/align]

[TWilliam]

$this->bbcode_second_pass_quote('Plantagenet', 'Y')ou introduced the idea that the plane vaporized on impact, not me.

[Plantagenet]

$this->bbcode_second_pass_quote('TWilliam', '')$this->bbcode_second_pass_quote('Plantagenet', 'Y')ou introduced the idea that the plane vaporized on impact, not me.

[Plantagenet]

Back to the subject, please.

HOW FAR CAN A CELL PHONE WORK?

The maximum range of a site (where it is not limited by interference with other sites nearby) depends on the same circumstances. Some technologies, such as GSM, have a fixed maximum range of 25 miles (40 km), which is imposed by technical limitations. CDMA and iDEN have no built-in limit, but the limiting factor is really the ability for a low-powered personal cell phone to transmit back to the cell site. As a rough guide, based on a tall site and flat terrain, it is possible to get between 30 to 45 miles (50-70 km).

--from Wikipedia

-------------

The claim by the conspiracy glimps that cell phones won't work over distances of 25-30,000 feet (5-6 miles) are obviously wrong.
Hahahahahah!

[Carlhole]

$this->bbcode_second_pass_quote('Plantagenet', 'H')OW FAR CAN A CELL PHONE WORK?

The maximum range of a site (where it is not limited by interference with other sites nearby) depends on the same circumstances. Some technologies, such as GSM, have a fixed maximum range of 25 miles (40 km), which is imposed by technical limitations. CDMA and iDEN have no built-in limit, but the limiting factor is really the ability for a low-powered personal cell phone to transmit back to the cell site. As a rough guide, based on a tall site and flat terrain, it is possible to get between 30 to 45 miles (50-70 km).

[Roy]

$this->bbcode_second_pass_quote('', '
')Don't be silly....of course cell phones work inside planes. Take a plane flight some time and when the stewardesses tell you its OK try out your phone... you'll find that your phone works great when you are still inside the plane

[NoLogos]

How many times do cell phones cut out when they are used here on the ground? Even today, the tech isn't perfect. That's what the redial button is for.
There are those who wish to pretend that The Official Conspiracy Theory is something other than a festering pile of excrement. These people must be finding it very very hard to hire even marginally competent help these days.
Psst, hey, over here. Wanna work for a bunch of murderous thugs who's god is the dollar, and how to get it their religion?

[NoLogos]

$this->bbcode_second_pass_quote('Roy', '
')I could call my mom and say "Mom this is Roy, you believe me right?"

[Plantagenet]

$this->bbcode_second_pass_quote('Roy', ' ')I tried it multiple times on three flights between 2002 and 2005, and it NEVER worked. My phone got no signal.

I tried it because I found the story that passengers used their cellphones from moving jet aircraft on 9/11 to be unbelievable.

[Plantagenet]

Here's an interesting call from the hijacked planes:

"08:19: AA11 flight attendant Betty Ong reports hijacking via airphone"

Are you really pretending the airphone can't call from the plane to the ground? These phones have been successfuly used millions of times to call from planes to the ground... your claim they don't work is absurd

[WatchfulEye]

Cell phones do work pretty well on aircraft - however, there are some issues.

1) Signal strength is relatively weak. The aircraft are altitude, and cell phone masts are designed to have optimum signal near ground level, nevertheless they will pick up and transmit signals directly above reasonably well. The short wavelength of cell phone transmissions will go straight through the windows with very little attenuation. Hand held GPS units work perfectly well inside planes, and the GPS signal strength is hugely weaker and more prone to corruption than phone signals. It should be pointed out that cell phone signals can go 30 miles near ground level (in fact the signals can travel considerably further, but most systems don't allow such large distances because the time it takes the signal to travel that distance through the air becomes so long that the phone and base station can't synchronise transmissions), so a distance of 30,000 feet to the ground is not excessive. So, while you may get a signal, it may be relatively weak and degraded - but to get one at all, is certainly not a surprise. (It should also be noted that cell phones have a special 'emergency calls' mode, that is activated by dialing 911, 112 or whatever the local emergency number is. When this mode is activated the phone will send a special 'emergency call' request to all networks in range, even if it can't find it's normal network. E.g. if you have a T-mobile phone, but there is no T-mobile service, a 911 call will be accepted and carried by Cingular, assuming the phone and network use compatible signals, even if the phone otherwise reports 'no service').

What's not so clear is whether all these factors combined would allow useful cell phone connections to be obtained at 30,000 feet. I suspect they probably wouldn't work at that altitude. However, if the plane descended to below about 10,000 feet, I'd consider it very likely that at least some calls would be able to get through.

What's not clear from the timelines given about the 9/11 events is at what altitude the plane was when the calls were received, and whether those were cell phones or airphones. I do note that the first call was made from an airphone.

2) There is concern that the relatively powerful signals from cell phones inside the aircraft can disrupt sensitive electronics - e.g. avionics and navigation. Cell phones can disrupt audio equipment, as anyone who has a GSM phone will be familiar with. There have been numerous documented reports of autopilots drifting off course, or incorrect sensor readings in the cockpits, which have immediately corrected when a cell phone in use in the cabin was switched off. This new airborne cell phone technology makes use of the fact that cell phones transmit at the strength they are told to by the base station. By utilizing the fact that the base station and phones are very close, the phones can be commanded always to transmit at ultra-low power, minimizing risk of interference. Additionally, more modern aircraft are designed with cell phones as a potential source of interference and have greater shielding on sensitive cables/electronics.

3) A problem discovered in early days of cell networks was that at 30,000 feet a phone can 'see' several dozen masts. Having such a large number of masts tracking a phone causes excessive network load - made worse by cruising at 600 mph, where new base stations are constantly coming into view and falling out of view. Some early networks had base stations, or regional control systems crash or run very degraded, if phones were used on aircraft. Modern networks are much more resistant to this sort of problem, and generally will work fine.

[Plantagenet]

$this->bbcode_second_pass_quote('ferrelgiraffe', '
')
This proves that an even higher call to 40,000 feet in an airplane (not on a mountain, WITHOUT special antennaes AND using OLD TECHNOLOGY even, would be impossible.

[Plantagenet]

$this->bbcode_second_pass_quote('ferrelgiraffe', 'o')ld technology doesn't work over 1500 feet because it swamps the antena.